Rename test-cases that are not executed.

gcc/testsuite/ChangeLog:

	* g++.dg/uninit-pred-loop-1_a.cc: Moved to...
	* g++.dg/uninit-pred-loop-1_a.C: ...here.
	* g++.dg/uninit-pred-loop-1_b.cc: Moved to...
	* g++.dg/uninit-pred-loop-1_b.C: ...here.
	* g++.dg/uninit-pred-loop-1_c.cc: Moved to...
	* g++.dg/uninit-pred-loop-1_c.C: ...here.
	* g++.dg/uninit-pred-loop_1.cc: Moved to...
	* g++.dg/uninit-pred-loop_1.C: ...here.

diff --git a/gcc/testsuite/g++.dg/uninit-pred-loop_1.cc b/gcc/testsuite/g++.dg/uninit-pred-loop-1_a.C
similarity index 100%
rename from gcc/testsuite/g++.dg/uninit-pred-loop_1.cc
rename to gcc/testsuite/g++.dg/uninit-pred-loop-1_a.C

diff --git a/gcc/testsuite/g++.dg/uninit-pred-loop-1_b.cc b/gcc/testsuite/g++.dg/uninit-pred-loop-1_b.C
similarity index 100%
rename from gcc/testsuite/g++.dg/uninit-pred-loop-1_b.cc
rename to gcc/testsuite/g++.dg/uninit-pred-loop-1_b.C

diff --git a/gcc/testsuite/g++.dg/uninit-pred-loop-1_c.cc b/gcc/testsuite/g++.dg/uninit-pred-loop-1_c.C
similarity index 100%
rename from gcc/testsuite/g++.dg/uninit-pred-loop-1_c.cc
rename to gcc/testsuite/g++.dg/uninit-pred-loop-1_c.C

diff --git a/gcc/testsuite/g++.dg/uninit-pred-loop-1_a.cc b/gcc/testsuite/g++.dg/uninit-pred-loop_1.C
similarity index 100%
rename from gcc/testsuite/g++.dg/uninit-pred-loop-1_a.cc
rename to gcc/testsuite/g++.dg/uninit-pred-loop_1.C