make: fix standalone sharness run

The comparison was wrong

License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>

test/sharness/lib/test-lib.sh

@@ -9,7 +9,7 @@
 # use the ipfs tool to test against
 
 # add current directory to path, for ipfs tool.
-if test "$MAKE_SKIP_PATH" -ne "1"; then
+if test "$MAKE_SKIP_PATH" != "1"; then
 	BIN=$(cd .. && echo `pwd`/bin)
 	BIN2=$(cd ../.. && echo `pwd`/cmd/ipfs)
 	PATH=${BIN2}:${BIN}:${PATH}