generate the fat output binary.
CHECK: triple: 'x86_64-apple-darwin'
-CHECK: - filename: [[INPUTS_PATH:.*]]fat-test.o
+CHECK: - filename: {{'?}}[[INPUTS_PATH:.*]]fat-test.o
CHECK: DW_AT_name{{.*}} "x86_64_var"
CHECK: triple: 'i386-apple-darwin'
-CHECK: - filename: [[INPUTS_PATH]]fat-test.o
+CHECK: - filename: {{'?}}[[INPUTS_PATH]]fat-test.o
CHECK: DW_AT_name{{.*}} "i386_var"
CHECK: triple: 'x86_64h-apple-darwin'
-CHECK: - filename: [[INPUTS_PATH]]fat-test.o
+CHECK: - filename: {{'?}}[[INPUTS_PATH]]fat-test.o
CHECK: DW_AT_name{{.*}} "x86_64h_var"
CHECK: Running lipo