update samplerate to 0.2.1

deps/samplerate/include/samplerate.h

@@ -3,12 +3,12 @@
 ** All rights reserved.
 **
 ** This code is released under 2-clause BSD license. Please see the
-** file at : https://github.com/erikd/libsamplerate/blob/master/COPYING
+** file at : https://github.com/libsndfile/libsamplerate/blob/master/COPYING
 */
 
 /*
 ** API documentation is available here:
-**     http://www.mega-nerd.com/SRC/api.html
+**     http://libsndfile.github.io/libsamplerate/api.html
 */
 
 #ifndef SAMPLERATE_H
@@ -25,7 +25,7 @@ typedef struct SRC_STATE_tag SRC_STATE ;
 /* SRC_DATA is used to pass data to src_simple() and src_process(). */
 typedef struct
 {	const float	*data_in ;
-	float	 *data_out ;
+	float	*data_out ;
 
 	long	input_frames, output_frames ;
 	long	input_frames_used, output_frames_gen ;
@@ -54,6 +54,12 @@ typedef long (*src_callback_t) (void *cb_data, float **data) ;
 
 SRC_STATE* src_new (int converter_type, int channels, int *error) ;
 
+/*
+** Clone a handle : return an anonymous pointer to a new converter
+** containing the same internal state as orig. Error returned in *error.
+*/
+SRC_STATE* src_clone (SRC_STATE* orig, int *error) ;
+
 /*
 **	Initilisation for callback based API : return an anonymous pointer to the
 **	internal state of the converter. Choose a converter from the enums below.

deps/samplerate/lib/pkgconfig/samplerate.pc

@@ -6,6 +6,7 @@ includedir=${prefix}/include
 Name: samplerate
 Description: An audio Sample Rate Conversion library
 Requires: 
-Version: 0.1.9
+Version: 0.2.1
 Libs: -L${libdir} -lsamplerate
+Libs.private: -lm
 Cflags: -I${includedir}