freeglut: Use -fcommon always
This package does not compile with -fno-common yet
errors out like
| /mnt/b/yoe/master/build/tmp/work/armv7vet2hf-neon-yoe-linux-musleabi/freeglut/3.2.1-r0/recipe-sysroot-native/usr/bin/arm-yoe-linux-musleabi/arm-yoe-linux-musleabi-ld: CMakeFiles/freeglut.dir/src/fg_gl2.c.o:/usr/src/debug/freeglut/3.2.1-
r0/freeglut-3.2.1/src/fg_gl2.h:72: multiple definition of `fghBindBuffer'; CMakeFiles/freeglut.dir/src/fg_geometry.c.o:/usr/src/debug/freeglut/3.2.1-r0/freeglut-3.2.1/src/fg_gl2.h:72: first defined here
Signed-off-by: Khem Raj <raj.khem@gmail.com>