Add hack to fix RC4_INT problems

The opensslconf.h for 64-bit has a special case for linux-x86_64 that sets
RC4_INT to "unsigned int" instead of "unsigned char"  Without this hack, any
server that chooses RC4-SHA for the SSL connection will segmentation fault
on x86-64 since the assembly code disagrees with the field size that C believes
it is.

(cherry picked from commit 9eca6470)

Bug: 18434518
Change-Id: I4eb1395fc122df5185af74500f4155a1095535c5