compiler/sem: correct macros lineinfo (#10438)

The compiler believes these are where a macro call starts (marked with
`^`):

    m "string"
    ^ ^

This commit addresses that.

nimsuggest/tests/tmacro_highlight.nim

@@ -0,0 +1,13 @@
+macro a(b: string): untyped = discard
+
+a "string"#[!]#
+
+discard """
+$nimsuggest --tester $file
+>highlight $1
+highlight;;skMacro;;1;;6;;1
+highlight;;skType;;1;;11;;6
+highlight;;skType;;1;;20;;7
+highlight;;skMacro;;3;;0;;1
+highlight;;skMacro;;3;;0;;1
+"""