Issue #1063: replace pronunciation of غ to Q

dictsource/ar_rules

          عْ           A
 
 .group غ
-         غ           gH
-         غ (_        gH
-         غّ           gH:
-         غّْ           gH:
-         غْ           gH
+         غ           Q
+         غ (_        Q
+         غّ           Q:
+         غّْ           Q:
+         غْ           Q
 
 .group ف
          ف           f

phsource/mbrola/ar1

 0   dZ  NULL  0    Z
 0   d   NULL  0    d
 0   f   NULL  0    f
-0   gH  NULL  0    G
+0   Q   NULL  0    G
 0   g   NULL  0    g
 1   H   a     40   X    a
 1   H   i     40   X    i