JVM: use 1 as a synthetic line number for @InlineOnly lambdas

The source path already marks it as synthetic.

compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnlyOneLine.kt

@@ -26,5 +26,5 @@ _2Kt
 kotlin/jvm/internal/FakeKt
 *L
 1#1,9:1
-65100#2:10
+1#2:10
 *E

compiler/testData/debug/stepping/voidLambdaStepInline.kt

@@ -10,7 +10,7 @@ fun box(): String {
 
 // LINENUMBERS
 // test.kt:4
-// fake.kt:65100
+// fake.kt:1
 // test.kt:4
 // test.kt:5
 // test.kt:6