[sanitizer] Use COMPILER_RT_EMULATOR with gtests

Reviewed By: morehouse

Differential Revision: https://reviews.llvm.org/D100998

compiler-rt/unittests/lit.common.unit.configured.in

diff --git a/compiler-rt/unittests/lit.common.unit.configured.in b/compiler-rt/unittests/lit.common.unit.configured.in
index d959d43..29e1615 100644
--- a/compiler-rt/unittests/lit.common.unit.configured.in
+++ b/compiler-rt/unittests/lit.common.unit.configured.in
@@ -12,6 +12,7 @@
 config.host_os = "@HOST_OS@"
 config.llvm_lib_dir = "@LLVM_LIBRARY_DIR@"
 config.gwp_asan = @COMPILER_RT_HAS_GWP_ASAN_PYBOOL@
+config.emulator = "@COMPILER_RT_EMULATOR@"
 
 # LLVM tools dir and build mode can be passed in lit parameters,
 # so try to apply substitution.