Added tests for ipfs --version.

1. Test that ipfs --version has a 0 exit status
2. Check the ipfs --version output matches ipfs version

License: MIT
Signed-off-by: Chris Sasarak <chris.sasarak@gmail.com>

test/sharness/t0010-basic-commands.sh

@@ -16,11 +16,24 @@ test_expect_success "ipfs version succeeds" '
 	ipfs version >version.txt
 '
 
+test_expect_success "ipfs --version success" '
+    ipfs --version ||
+    test_fsh ipfs --version
+'
+
 test_expect_success "ipfs version output looks good" '
 	egrep "^ipfs version [0-9]+\.[0-9]+\.[0-9]" version.txt >/dev/null ||
 	test_fsh cat version.txt
 '
 
+test_expect_success "ipfs versions matches ipfs --version" '
+    ipfs version > version.txt &&
+    ipfs --version > version2.txt &&
+    diff version2.txt version.txt ||
+    test_fsh ipfs --version
+
+'
+
 test_expect_success "ipfs version --all has all required fields" '
 	ipfs version --all > version_all.txt &&
 	grep "go-ipfs version" version_all.txt &&