commands/file: Fix for "executable" match failure on newer gcc

On newer gcc, --enable-default-pie is enabled by default,
thus in.c is compiled as position independent executable,
which is described as "shared object", so add this.

Signed-off-by: Guangwen Feng <[email protected]>
Signed-off-by: Fei Jie <[email protected]>
Signed-off-by: Lei Shaoting <[email protected]>
Acked-by: Cyril Hrubis <[email protected]>

Author: Guangwen Feng

testcases/commands/file/file01.sh

@@ -88,7 +88,8 @@ do_test()
 			    "[pP]ython script text executable";;
 	 9) file_test in.m4 "M4 macro processor script, ASCII text" \
 			    "ASCII M4 macro language pre-processor text";;
-	10) file_test in "ELF .*-bit $TEST_ARCH executable, .*";;
+	10) file_test in "ELF .*-bit $TEST_ARCH executable, .*" \
+			 "ELF .*-bit $TEST_ARCH shared object, .*";;
 	11) file_test in.ar "current ar archive";;
 	12) file_test in.tar "tar archive";;
 	13) file_test in.tar.gz "gzip compressed data, .*";;