Remove new build flags from HOSTCXXFLAGS
Revert "lib/lzo: huge LZO decompression speedup on ARM by using unaligned access"

This reverts commit 0f85f8b7784dfc5d6fab7d19ddfa91e2f309a723.
Revert "lib/lzo: Update LZO compression to current upstream version"

This reverts commit f06420adcc6c158b6e418f871c1811c41bc9b212.
Revert "lib/lzo: Rename lzo1x_decompress.c to lzo1x_decompress_safe.c"

This reverts commit e01b4da7fb02efbbbd2b733a19279b7a56e27dd6.