e2fsprogs: fix test f_detect_junk print error msg

This test need to check config.h, so install it
to fix below err msg:

grep: ../lib/config.h: No such file or directory
./test/f_detect_junk/script: line 3: [: : integer expression expected
f_detect_junk: detect non-fs file data: ok

(From OE-Core rev: 53f2ad2ec54fd69d91c2445c4ae20585b836e2ea)

Signed-off-by: Changqing Li <changqing.li@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/e2fsprogs/e2fsprogs_1.44.3.bb

@@ -129,4 +129,7 @@ do_install_ptest() {
 	find "${D}${PTEST_PATH}" -type f \
 	    \( -name 'Makefile' -o -name 'Makefile.in' -o -name '*.o' -o -name '*.c' -o -name '*.h' \)\
 	    -exec  rm -f {} +
+
+        install -d ${D}${PTEST_PATH}/lib
+        install -m 0644 ${B}/lib/config.h  ${D}${PTEST_PATH}/lib/
 }