arch/armel: -funsafe-math-optimizations added as arch-dep definition

UNCERTAIN: I attatched this to armel.sh only, as this is needed by
-mfpu. I do not believe that this should be used elsewhere, at least
within our current arch support.

Author: MingcongBai

arch/armel.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
 ##arch/armel.sh: Build definitions for armel.
 ##@copyright GPL-2.0+
-CFLAGS_COMMON_ARCH='-march=armv7-a -mtune=cortex-a7 -mfpu=neon -mfloat-abi=hard '
+CFLAGS_COMMON_ARCH='-march=armv7-a -mtune=cortex-a7 -mfpu=neon -mfloat-abi=hard -funsafe-math-optimizations '
 LDFLAGS_COMMON_CROSS='-Wl,-rpath -Wl,/usr/lib -Wl,-rpath-link -Wl,/var/ab/cross-root/armel/usr/lib -L/var/ab/cross-root/armel/usr/lib '