Fix compliation on gcc-4.3 and ARMv5T

 - smulbb is only on ARMv5TE and above (p316, ARM Architecture Reference Manual)
 - an empty clobber list causes a compiler error with my compiler, gcc-4.3.2

Patch by Joel Stanley <joel@jms.id.au>

Review URL: http://codereview.appspot.com/96165


git-svn-id: http://skia.googlecode.com/svn/trunk@329 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed