When building out of tree, the generated files are put in builddir rather
than srcdir, so handle that properly.
AM_CFLAGS = \
-I$(top_srcdir)/src \
+ -I$(top_builddir)/src \
-I$(top_srcdir)/src/modules \
+ -I$(top_builddir)/src/modules \
-I$(top_srcdir)/src/modules/rtp \
+ -I$(top_builddir)/src/modules/rtp \
-I$(top_srcdir)/src/modules/gconf \
+ -I$(top_builddir)/src/modules/gconf \
-I$(top_srcdir)/src/modules/bluetooth \
+ -I$(top_builddir)/src/modules/bluetooth \
-I$(top_srcdir)/src/modules/raop \
$(PTHREAD_CFLAGS) -D_POSIX_PTHREAD_SEMANTICS \
$(LTDLINCL) \