bug 511791 - configure and PGO fail with ICC. r=bsmedberg

configure.in

@@ -444,7 +444,7 @@ fi
 INTEL_CC=
 INTEL_CXX=
 if test "$GCC" = yes; then
-   if test "`$CC -help 2>&1 | grep -c 'Intel(R) C Compiler'`" != "0"; then
+   if test "`$CC -help 2>&1 | grep -c 'Intel(R) C++ Compiler'`" != "0"; then
      INTEL_CC=1
    fi
 fi

js/src/configure.in

@@ -389,7 +389,7 @@ fi
 INTEL_CC=
 INTEL_CXX=
 if test "$GCC" = yes; then
-   if test "`$CC -help 2>&1 | grep -c 'Intel(R) C Compiler'`" != "0"; then
+   if test "`$CC -help 2>&1 | grep -c 'Intel(R) C++ Compiler'`" != "0"; then
      INTEL_CC=1
    fi
 fi