[libFuzzer] Don't add newline character when using echo in tests.

[mpividori]

Summary

I add the option "-n", so we don't add a new line character at the end of the file when using echo. (on Windows this means 2 characters).

[kcc]

LGTM

llvm/trunk/lib/Fuzzer/test/fuzzer-dirs.test

 RUN: rm -rf %t/SUB1
 RUN: mkdir -p %t/SUB1/SUB2/SUB3
 RUN: echo a > %t/SUB1/a
 RUN: echo b > %t/SUB1/SUB2/b
 RUN: echo c > %t/SUB1/SUB2/SUB3/c
 RUN: LLVMFuzzer-SimpleTest %t/SUB1 -runs=0 2>&1 | FileCheck %s --check-prefix=SUBDIRS
 SUBDIRS: READ   units: 3
-RUN: echo zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz > %t/SUB1/long
+RUN: echo -n zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz > %t/SUB1/long
 RUN: LLVMFuzzer-SimpleTest %t/SUB1 -runs=0 2>&1 | FileCheck %s --check-prefix=LONG
-LONG: INFO: -max_len is not provided, using 94
+LONG: INFO: -max_len is not provided, using 93
 RUN: rm -rf %t/SUB1
 
 RUN: not LLVMFuzzer-SimpleTest NONEXISTENT_DIR 2>&1 | FileCheck %s --check-prefix=NONEXISTENT_DIR
 NONEXISTENT_DIR: No such directory: NONEXISTENT_DIR; exiting
 

llvm/trunk/lib/Fuzzer/test/minimize_crash.test

 RUN: echo 'Hi!rv349f34t3gg' > not_minimal_crash
 RUN: LLVMFuzzer-NullDerefTest -minimize_crash=1 not_minimal_crash -max_total_time=2 2>&1 | FileCheck %s
 CHECK: CRASH_MIN: failed to minimize beyond ./minimized-from-{{.*}} (3 bytes), exiting
 RUN: LLVMFuzzer-NullDerefTest -minimize_crash=1 not_minimal_crash -max_total_time=2 -exact_artifact_path=exact_minimized_path 2>&1 | FileCheck %s --check-prefix=CHECK_EXACT
 CHECK_EXACT: CRASH_MIN: failed to minimize beyond exact_minimized_path (3 bytes), exiting
 RUN: rm not_minimal_crash minimized-from-* exact_minimized_path
 
-RUN: echo 'abcd*xyz' > not_minimal_crash
+RUN: echo -n 'abcd*xyz' > not_minimal_crash
 RUN: LLVMFuzzer-SingleByteInputTest -minimize_crash=1 not_minimal_crash -artifact_prefix=./ZZZ- -exact_artifact_path=exact_minimized_path 2>&1 | FileCheck %s --check-prefix=MIN1
 MIN1: Test unit written to ./ZZZ-minimized-from-
 MIN1: INFO: The input is small enough, exiting
 MIN1: CRASH_MIN: failed to minimize beyond exact_minimized_path (1 bytes), exiting