app_server: workaround for GCC 4.7 misbehavior in IntRect.

* moved the inlined BRect constructor of IntRect to the cpp file. GCC will inline the method
anyway.
* impacted methods were both AGGTextRenderer::RenderString() in
src/servers/app/drawing/Painter/AGGTextRenderer.cpp, calling the StringRenderer constructor
with a BRect reference.
* unless someone comes up with an explanation, I'll try to come with a smaller testcase to
submit this problem upstream.

src/servers/app/IntRect.cpp

@@ -12,6 +12,15 @@
 #include <stdio.h>
 
 
+IntRect::IntRect(const BRect &r)
+{
+	left = (int32)r.left;
+	top = (int32)r.top;
+	right = (int32)r.right;
+	bottom = (int32)r.bottom;
+}
+
+
 void
 IntRect::SetLeftTop(const IntPoint& p)
 {

src/servers/app/IntRect.h

@@ -149,16 +149,6 @@ IntRect::IntRect(const IntRect &r)
 }
 
 
-inline
-IntRect::IntRect(const BRect &r)
-{
-	left = (int32)r.left;
-	top = (int32)r.top;
-	right = (int32)r.right;
-	bottom = (int32)r.bottom;
-}
-
-
 inline
 IntRect::IntRect(const IntPoint& leftTop, const IntPoint& rightBottom)
 {