Automatically generate private symbol name mangling macros.

Rather than using a manually maintained list of internal symbols to
drive name mangling, add a compilation phase to automatically extract
the list of internal symbols.

This resolves #677.

.gitignore

@@ -1,5 +1,3 @@
-/*.gcov.*
-
 /bin/jemalloc-config
 /bin/jemalloc.sh
 /bin/jeprof
@@ -24,6 +22,9 @@
 /include/jemalloc/internal/jemalloc_preamble.h
 /include/jemalloc/internal/jemalloc_internal_defs.h
 /include/jemalloc/internal/private_namespace.h
+/include/jemalloc/internal/private_namespace_jet.h
+/include/jemalloc/internal/private_symbols.awk
+/include/jemalloc/internal/private_symbols_jet.awk
 /include/jemalloc/internal/public_namespace.h
 /include/jemalloc/internal/public_symbols.txt
 /include/jemalloc/internal/public_unnamespace.h
@@ -39,8 +40,7 @@
 /include/jemalloc/jemalloc_typedefs.h
 
 /src/*.[od]
-/src/*.gcda
-/src/*.gcno
+/src/*.sym
 
 /test/test.sh
 test/include/test/jemalloc_test.h
@@ -49,33 +49,23 @@ test/include/test/jemalloc_test_defs.h
 /test/integration/[A-Za-z]*
 !/test/integration/[A-Za-z]*.*
 /test/integration/*.[od]
-/test/integration/*.gcda
-/test/integration/*.gcno
 /test/integration/*.out
 
 /test/integration/cpp/[A-Za-z]*
 !/test/integration/cpp/[A-Za-z]*.*
 /test/integration/cpp/*.[od]
-/test/integration/cpp/*.gcda
-/test/integration/cpp/*.gcno
 /test/integration/cpp/*.out
 
 /test/src/*.[od]
-/test/src/*.gcda
-/test/src/*.gcno
 
 /test/stress/[A-Za-z]*
 !/test/stress/[A-Za-z]*.*
 /test/stress/*.[od]
-/test/stress/*.gcda
-/test/stress/*.gcno
 /test/stress/*.out
 
 /test/unit/[A-Za-z]*
 !/test/unit/[A-Za-z]*.*
 /test/unit/*.[od]
-/test/unit/*.gcda
-/test/unit/*.gcno
 /test/unit/*.out
 
 /VERSION