Add support for integer mod.

Change-Id: I681b8220c8b39d865ade036a93ba93a965e259c9
diff --git a/libs/rs/rsScriptC_Lib.cpp b/libs/rs/rsScriptC_Lib.cpp
index ab8d9d7..7e4a247 100644
--- a/libs/rs/rsScriptC_Lib.cpp
+++ b/libs/rs/rsScriptC_Lib.cpp
@@ -345,6 +345,10 @@
     return a / b;
 }
 
+int SC_modsi3(int a, int b) {
+    return a % b;
+}
+
 int SC_getAllocation(const void *ptr) {
     GET_TLS();
     const Allocation *alloc = sc->ptrToAllocation(ptr);
@@ -402,6 +406,7 @@
 
 static ScriptCState::SymbolTable_t gSyms[] = {
     { "__divsi3", (void *)&SC_divsi3, true },
+    { "__modsi3", (void *)&SC_modsi3, true },
 
     // allocation
     { "_Z19rsAllocationGetDimX13rs_allocation", (void *)&SC_allocGetDimX, true },
@@ -528,4 +533,3 @@
     }
     return NULL;
 }
-