CLJS-1624: Avoid the use of JSC_HOME for tests

Don't make use of JSC_HOME because it triggers a warning in command-line
apps that make use of JavaScriptCore owing to

   http://trac.webkit.org/changeset/194606

Instead, we can simply check to see if jsc is on the path.

Author: mfikes

script/benchmark

@@ -19,11 +19,11 @@ else
   "${SPIDERMONKEY_HOME}/js" -f builds/out-adv-bench/core-advanced-benchmark.js
 fi
 
-if [ "$JSC_HOME" = "" ]; then
-  echo "JSC_HOME not set, skipping JavaScriptCore benchmarks"
+if ! hash jsc 2>/dev/null; then
+  echo "jsc not on path, skipping JavaScriptCore benchmarks"
 else
   echo "Benchmarking with JavaScriptCore"
-  "${JSC_HOME}/jsc" -f builds/out-adv-bench/core-advanced-benchmark.js
+  jsc -f builds/out-adv-bench/core-advanced-benchmark.js
 fi
 
 if [ "$NASHORN_HOME" = "" ]; then

script/test

@@ -26,11 +26,11 @@ else
   ran=$((ran+1))
 fi
 
-if [ "$JSC_HOME" = "" ]; then
-  echo "JSC_HOME not set, skipping JavaScriptCore tests"
+if ! hash jsc 2>/dev/null; then
+  echo "jsc not on path, skipping JavaScriptCore tests"
 else
   echo "Testing with JavaScriptCore"
-  "${JSC_HOME}/jsc" -f builds/out-adv/core-advanced-test.js
+  jsc -f builds/out-adv/core-advanced-test.js
   ran=$((ran+1))
 fi
 

script/test-simple

@@ -27,11 +27,11 @@ else
 fi
 
 # commented out because of memory issue in JSC w/ nested fn calls - David
-#if [ "$JSC_HOME" = "" ]; then
-#  echo "JSC_HOME not set, skipping JavaScriptCore tests"
+#if ! hash jsc 2>/dev/null; then
+#  echo "jsc not on path, skipping JavaScriptCore tests"
 #else
 #  echo "Testing with JavaScriptCore"
-#  "${JSC_HOME}/jsc" -f builds/out-simp/core-simple-test.js
+#  jsc -f builds/out-simp/core-simple-test.js
 #  ran=$[ran+1]
 #fi