meson.build: fix build without C++
Fix the following build failure without C++: ../output-1/build/pulseaudio-16.1/meson.build:1:0: ERROR: Unknown compiler(s): [['/home/autobuild/autobuild/instance-1/output-1/per-package/pulseaudio/host/bin/powerpc64-buildroot-linux-gnu-g++']] The following exception(s) were encountered: Running "/home/autobuild/autobuild/instance-1/output-1/per-package/pulseaudio/host/bin/powerpc64-buildroot-linux-gnu-g++ --version" gave "[Errno 2] No such file or directory: '/home/autobuild/autobuild/instance-1/output-1/per-package/pulseaudio/host/bin/powerpc64-buildroot-linux-gnu-g++'" Fixes: - http://autobuild.buildroot.org/results/6526a21bd4da3b8458188f27c1ec04c381e4b673 Signed-off-by:Fabrice Fontaine <fontaine.fabrice@gmail.com> Part-of: <!737>