PDB: Increase maximum number of "aclass" registrations

gdb/symtab.c

diff --git a/gdb/symtab.c b/gdb/symtab.c
index 3cc2d4f..6dca6d0 100644
--- a/gdb/symtab.c
+++ b/gdb/symtab.c
@@ -6480,7 +6480,7 @@ static int next_aclass_value = LOC_FINAL_VALUE;
 
 /* The maximum number of "aclass" registrations we support.  This is
    constant for convenience.  */
-#define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)
+#define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 16)
 
 /* The objects representing the various "aclass" values.  The elements
    from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent