Replace assert() with project-specific version.

Our convention is to use our own form of assertion (bccAssert,
rsAssert, slangAssert) rather than C standard assertion (assert)
because the latter is disabled for the Android build process.
However, a few instances of assert() somehow made it through.

Bug 21444723

Change-Id: I02a212627d4d5e70eadb379f359c4ac9bc88bde7
1 file changed