test-many-klibcs: Add MIPS r6 variants

As if there weren't enough already...
diff --git a/test-many-klibcs b/test-many-klibcs
index 310fe28..745fb93 100755
--- a/test-many-klibcs
+++ b/test-many-klibcs
@@ -321,6 +321,14 @@
 process mips    mips    mixed mipsel-linux-gnu        mipsel
 process mips64  mips    gnu   mips64el-linux-gnuabi64 mips64el
 process mips64  mips    mixed mips64el-linux-gnuabi64 mips64el
+process mips    mips    gnu   mipsisa32r6-linux-gnu   mips:mips32r6-generic
+process mips    mips    mixed mipsisa32r6-linux-gnu   mips:mips32r6-generic
+process mips64  mips    gnu   mipsisa64r6-linux-gnuabi64 mips64:I6400
+process mips64  mips    mixed mipsisa64r6-linux-gnuabi64 mips64:I6400
+process mips    mips    gnu   mipsisa32r6el-linux-gnu mipsel:mips32r6-generic
+process mips    mips    mixed mipsisa32r6el-linux-gnu mipsel:mips32r6-generic
+process mips64  mips    gnu   mipsisa64r6el-linux-gnuabi64 mips64el:I6400
+process mips64  mips    mixed mipsisa64r6el-linux-gnuabi64 mips64el:I6400
 process parisc  parisc  gnu   hppa-linux-gnu          hppa
 process ppc     powerpc gnu   powerpc-linux-gnu       ppc
 process ppc     powerpc llvm  powerpc-linux-gnu       ppc