Fuzzer: remove temporary files after we're done with them.

These were just copies of the relevant fuzzer binary with (presumably)
meaningful suffixes, but accounted for more than 10% of my build
directory (> 8GB). Hard drive space is cheap, but not that cheap.

llvm-svn: 326710
diff --git a/llvm/test/tools/llvm-opt-fuzzer/exec-options.ll b/llvm/test/tools/llvm-opt-fuzzer/exec-options.ll
index dc4daa7..9c87abc 100644
--- a/llvm/test/tools/llvm-opt-fuzzer/exec-options.ll
+++ b/llvm/test/tools/llvm-opt-fuzzer/exec-options.ll
@@ -8,17 +8,21 @@
 
 ; RUN: cp llvm-opt-fuzzer %t.bin--
 ; RUN: not %t.bin-- %t.input 2>&1 | FileCheck -check-prefix=EMPTY %s
+; RUN: rm %t.bin--
 ; EMPTY: -mtriple must be specified
 
 ; RUN: cp llvm-opt-fuzzer %t.bin--x86_64
 ; RUN: not %t.bin--x86_64 %t.input 2>&1 | FileCheck -check-prefix=PASSES %s
+; RUN: rm %t.bin--x86_64
 ; PASSES: at least one pass should be specified
 
 ; RUN: cp llvm-opt-fuzzer %t.bin--x86_64-unknown
 ; RUN: not %t.bin--x86_64-unknown %t.input 2>&1 | FileCheck -check-prefix=UNKNOWN %s
+; RUN: rm %t.bin--x86_64-unknown
 ; UNKNOWN: Unknown option: unknown
 
 ; RUN: cp llvm-opt-fuzzer %t.bin--x86_64-instcombine
 ; RUN: %t.bin--x86_64-instcombine %t.input 2>&1 | FileCheck -check-prefix=CORRECT %s
+; RUN: rm %t.bin--x86_64-instcombine
 ; CORRECT: Injected args: -mtriple=x86_64 -passes=instcombine
 ; CORRECT: Running