Add mutex.h to src/Makefile.am

rigs/tentec/orion.c

@@ -1,5 +1,6 @@
 /*
  *  Hamlib TenTenc backend - TT-565 description
+ *  Copyright (c) 2024      by Michael Black W9MDB
  *  Copyright (c) 2004-2011 by Martin Ewing
  *  Copyright (c) 2004-2010 by Stephane Fillod
  *

src/Makefile.am

@@ -11,7 +11,7 @@ RIGSRC = hamlibdatetime.h rig.c serial.c serial.h misc.c misc.h register.c regis
    	par_nt.h microham.c microham.h amplifier.c amp_reg.c amp_conf.c \
    	amp_conf.h amp_settings.c extamp.c sleep.c sleep.h sprintflst.c \
    	sprintflst.h cache.c cache.h snapshot_data.c snapshot_data.h fifo.c fifo.h \
-    serial_cfg_params.h
+    serial_cfg_params.h mutex.h
 
 if VERSIONDLL
 RIGSRC +=	\