Build mips32r2_fp_xburst target with Clang

codegen_test has been fixed with
    https://android-review.googlesource.com/#/c/202382/.

055-enum-performance is failing with both, GCC and Clang.

Bug: 26635783
Change-Id: I1d7a30a7548a43d12ad14442d1c8ac74b916d482
diff --git a/mips32r2_fp_xburst/BoardConfig.mk b/mips32r2_fp_xburst/BoardConfig.mk
index a2facfe..7a71998 100644
--- a/mips32r2_fp_xburst/BoardConfig.mk
+++ b/mips32r2_fp_xburst/BoardConfig.mk
@@ -24,7 +24,4 @@
 TARGET_ARCH_VARIANT := mips32r2-fp-xburst
 ARCH_MIPS_PAGE_SHIFT := 12
 
-# Build with GCC, as building with Clang breaks some ART tests:
-# - codegen_test, failing on SIGILL ("Illegal instruction") (b/26635783);
-# - 055-enum-performance (taking to long to complete) (b/26636096).
-USE_CLANG_PLATFORM_BUILD := false
+USE_CLANG_PLATFORM_BUILD := true