always flush scopes on closing brace

without that, both the lines
  cond1 { cond2: VAR = val }
and
  cond1 { cond2: else: cond3 }
would yield two bogus errors: first an excess brace, and then a missing
one.

Change-Id: I8609106c1ad387577deec2077e2ce13507ac4d3f
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
(cherry picked from qtbase/962c7ab6f8705a8fb7b60c3544d4189503c1ec17)

src/shared/proparser/qmakeparser.cpp

@@ -721,8 +721,9 @@ void QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra
                     } else if (c == '}') {
                         FLUSH_LHS_LITERAL();
                         finalizeCond(tokPtr, buf, ptr, wordCount);
-                        flushScopes(tokPtr);
+                        m_state = StNew; // De-facto newline
                       closeScope:
+                        flushScopes(tokPtr);
                         if (!m_blockstack.top().braceLevel) {
                             parseError(fL1S("Excess closing brace."));
                         } else if (!--m_blockstack.top().braceLevel