Allow using calldata keyword to specify data location

test/libsolidity/syntaxTests/dataLocations/internalFunction/function_argument_location_specifier_test_internal_calldata.sol

@@ -0,0 +1,5 @@
+contract test {
+    function f(bytes calldata) internal;
+}
+// ----
+// TypeError: (31-36): Variable cannot be declared as "calldata" (remove the "calldata" keyword).

test/libsolidity/syntaxTests/dataLocations/internalFunction/function_argument_location_specifier_test_internal_memory.sol

@@ -0,0 +1,4 @@
+contract test {
+    function f(bytes memory) internal;
+}
+// ----

test/libsolidity/syntaxTests/dataLocations/internalFunction/function_argument_location_specifier_test_internal_storage.sol

@@ -0,0 +1,4 @@
+contract test {
+    function f(bytes storage) internal;
+}
+// ----