Previously, FPU detction was done before the variables for compiling (CC, CFLAGS, etc) were set. This broke on cross-compiles, because it was trying to use the default $(CC) to do the checks.

By doing the FPU detection after setting all the variables, FPU detection for cross-compiles works spectacularly.
Signed-off-by: Rafaël Carré <funman@videolan.org>