default-reporter: Fix source location in functions change report

default-reporter: Fix source location in functions change report

While looking at something else, I realized that the default-reporter
mentions the source location of the new function in lieu of the old function
when reporting about a function change.  Fixed thus.

	* src/abg-default-reporter.cc (default_reporter::report): In the
	overload of function_decl, use the source location of the old
	function.
	* tests/data/test-abicompat/test0-fn-changed-report-2.txt: Adjust.
	* tests/data/test-abidiff-exit/qualifier-typedef-array-report-1.txt:
	Likewise.
	* tests/data/test-abidiff-exit/test-PR28316-report.txt: Likewise.
	* tests/data/test-abidiff-exit/test-decl-enum-report.txt:
	Likewise.
	* tests/data/test-abidiff-exit/test-decl-struct-report.txt:
	Likewise.
	* tests/data/test-abidiff-exit/test-fun-param-report.txt:
	Likewise.
	* tests/data/test-abidiff-exit/test-headers-dirs/test-headers-dir-report-2.txt:
	Likewise.
	* tests/data/test-abidiff-exit/test-loc-with-locs-report.txt:
	Likewise.
	* tests/data/test-abidiff-exit/test-member-size-report0.txt:
	Likewise.
	* tests/data/test-abidiff-exit/test-rhbz2114909-report-1.txt:
	Likewise.
	* tests/data/test-diff-filter/libtest45-basic-type-change-report-0.txt:
	Likewise.
	* tests/data/test-diff-filter/test-PR24731-report-1.txt: Likewise.
	* tests/data/test-diff-filter/test-PR25661-1-report-2.txt:
	Likewise.
	* tests/data/test-diff-filter/test-PR25661-2-report-2.txt:
	Likewise.
	* tests/data/test-diff-filter/test-PR25661-3-report-2.txt:
	Likewise.
	* tests/data/test-diff-filter/test-PR25661-4-report-2.txt:
	Likewise.
	* tests/data/test-diff-filter/test-PR25661-5-report-2.txt:
	Likewise.
	* tests/data/test-diff-filter/test-PR25661-6-report-3.txt:
	Likewise.
	* tests/data/test-diff-filter/test-PR25661-7-report-3.txt:
	Likewise.
	* tests/data/test-diff-filter/test-PR26739-2-report-0.txt:
	Likewise.
	* tests/data/test-diff-filter/test-PR29387-report.txt: Likewise.
	* tests/data/test-diff-filter/test30-pr18904-rvalueref-report1.txt:
	Likewise.
	* tests/data/test-diff-filter/test30-pr18904-rvalueref-report2.txt:
	Likewise.
	* tests/data/test-diff-filter/test31-pr18535-libstdc++-report-1.txt:
	Likewise.
	* tests/data/test-diff-filter/test36-report-0.txt: Likewise.
	* tests/data/test-diff-filter/test37-report-0.txt: Likewise.
	* tests/data/test-diff-filter/test39/test39-report-0.txt:
	Likewise.
	* tests/data/test-diff-filter/test41-report-0.txt: Likewise.
	* tests/data/test-diff-filter/test44-anonymous-data-member-report-0.txt:
	Likewise.
	* tests/data/test-diff-pkg/dirpkg-3-report-2.txt: Likewise.
	* tests/data/test-diff-pkg/libICE-1.0.6-1.el6.x86_64.rpm--libICE-1.0.9-2.el7.x86_64.rpm-report-0.txt:
	Likewise.
	* tests/data/test-diff-pkg/nss-3.23.0-1.0.fc23.x86_64-report-0.txt:
	Likewise.
	* tests/data/test-diff-pkg/spice-server-0.12.4-19.el7.x86_64-0.12.8-1.el7.x86_64-report-0.txt:
	Likewise.
	* tests/data/test-diff-pkg/spice-server-0.12.4-19.el7.x86_64-0.12.8-1.el7.x86_64-report-1.txt:
	Likewise.
	* tests/data/test-diff-pkg/spice-server-0.12.4-19.el7.x86_64-0.12.8-1.el7.x86_64-report-2.txt:
	Likewise.
	* tests/data/test-diff-pkg/symlink-dir-test1-report0.txt:
	Likewise.
	* tests/data/test-diff-pkg/tarpkg-1-report-0.txt: Likewise.
	* tests/data/test-diff-pkg/tbb-4.1-9.20130314.fc22.x86_64--tbb-4.3-3.20141204.fc23.x86_64-report-0.txt:
	Likewise.
	* tests/data/test-diff-pkg/tbb-4.1-9.20130314.fc22.x86_64--tbb-4.3-3.20141204.fc23.x86_64-report-1.txt:
	Likewise.
	* tests/data/test-diff-suppr/PR28073/PR28073-output-2.txt:
	Likewise.
	* tests/data/test-diff-suppr/libtest48-soname-abixml-report-1.txt:
	Likewise.
	* tests/data/test-diff-suppr/test30-report-0.txt: Likewise.
	* tests/data/test-diff-suppr/test41-enumerator-changes-report-0.txt:
	Likewise.
	* tests/data/test-diff-suppr/test42-negative-suppr-type-report-0.txt:
	Likewise.
	* tests/data/test-diff-suppr/test42-negative-suppr-type-report-1.txt:
	Likewise.
	* tests/data/test-diff-suppr/test6-fn-suppr-report-0-1.txt:
	Likewise.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>