[common] framebuffer: improve client framebuffer read performance

Extensive profiling reveals that the glibc memcpy performs up to 2x
faster then the existing SIMD implementation that was in use here. This
patch also will copy large 1MB chunks if the pitch of the source and
destination match further increasing throughput.

common/include/common/framebuffer.h

@@ -37,7 +37,7 @@ extern const size_t FrameBufferStructSize;
 /**
  * Wait for the framebuffer to fill to the specified size
  */
-void framebuffer_wait(const FrameBuffer * frame, size_t size);
+bool framebuffer_wait(const FrameBuffer * frame, size_t size);
 
 /**
  * Read data from the KVMFRFrame into the dst buffer