Minor: Fix some test cases

compiler/testData/codegen/bytecodeText/stringOperations/primitiveToString.kt

@@ -1,15 +1,16 @@
-// IGNORE_BACKEND: JVM_IR
-fun main() {
-    false.toString()
-    1.toByte().toString()
-    1.toShort().toString()
-    1.toString()
-    1L.toString()
-    1.0F.toString()
-    1.0.toString()
-    'c'.toString()
-}
+fun boolConst() = false.toString()
+fun byteConst() = 1.toByte().toString()
+fun shortConst() = 1.toShort().toString()
+fun intConst() = 1.toString()
+fun longConst() = 1L.toString()
+fun floatConst() = 1.0F.toString()
+fun doubleConst() = 1.0.toString()
+fun charConst() = 'c'.toString()
 
 /*Check that all "valueOf" are String ones and there is no boxing*/
+// JVM_TEMPLATES:
 // 8 valueOf
 // 8 INVOKESTATIC java/lang/String.valueOf
+// JVM_IR_TEMPLATES:
+// 0 valueOf
+// 8 LDC \"