Add mips32 r1 to the list of supported targets for Mips fast-isel

Summary:
Expand list of supported targets for Mips to include mips32 r1.
Previously it only include r2. More patches are coming where there is 
a difference but in the current patches as pushed upstream, r1 and r2
are equivalent.

Test Plan:
simplestorefp1.ll

add new build bots at mips to test this flavor at both -O0 and -O2

Reviewers: dsanders

Reviewed By: dsanders

Differential Revision: http://reviews.llvm.org/D5306

llvm-svn: 217821
diff --git a/llvm/test/CodeGen/Mips/Fast-ISel/loadstrconst.ll b/llvm/test/CodeGen/Mips/Fast-ISel/loadstrconst.ll
index b32e857..93cf4c1 100644
--- a/llvm/test/CodeGen/Mips/Fast-ISel/loadstrconst.ll
+++ b/llvm/test/CodeGen/Mips/Fast-ISel/loadstrconst.ll
@@ -1,5 +1,7 @@
 ; RUN: llc -march=mipsel -relocation-model=pic -O0 -mips-fast-isel -fast-isel-abort -mcpu=mips32r2 \
 ; RUN:     < %s | FileCheck %s
+; RUN: llc -march=mipsel -relocation-model=pic -O0 -mips-fast-isel -fast-isel-abort -mcpu=mips32 \
+; RUN:     < %s | FileCheck %s
 
 @.str = private unnamed_addr constant [6 x i8] c"hello\00", align 1
 @s = common global i8* null, align 4