sparc: Fix problem with assembler files
Revert bootstrap whitespace changes.
arm: Add FUNCTION_THUMB_ENTRY(), etc.

Add FUNCTION_THUMB_ENTRY(), FUNCTION_ENTRY() and FUNCTION_END().
score: Add CPU context validation
arm: Simplify architecture selection
arm: Support VFP-D32 and Neon
libtests/malloc04: Prevent compiler optimizations
libcsupport: Avoid division by zero