fdo#42865: privatized unique empty string symbol:

Unfortunately this --enable-dbg-util only problem (caused by
_GLIBCXX_DEUBG) resurfaced, perhaps because of new std::string based
logging in sal; adapt all map files to export the unique symbol.

cppu/util/cppu.map

@@ -132,4 +132,5 @@ UDK_3.3 {   # OOo 2.4
 GLIBCXX_3.4 {
     global:
         _ZGVNSt7num_put*; _ZNSt7num_put*;
+        _ZNSs4_Rep20_S_empty_rep_storageE;
 };

cppu/util/uno_purpenvhelpergcc3.map

@@ -13,4 +13,5 @@ UDK_3_0_0 {
 GLIBCXX_3.4 {
     global:
         _ZGVNSt7num_put*; _ZNSt7num_put*;
+        _ZNSs4_Rep20_S_empty_rep_storageE;
 };

cppuhelper/source/gcc3.map

@@ -411,5 +411,6 @@ global:
 # Unique libstdc++ symbols:
 GLIBCXX_3.4 {
     global:
-    _ZGVNSt7num_put*; _ZNSt7num_put*;
+        _ZGVNSt7num_put*; _ZNSt7num_put*;
+        _ZNSs4_Rep20_S_empty_rep_storageE;
 };

sal/util/sal.map

@@ -667,4 +667,5 @@ PRIVATE_file.1 { # LibreOffice 3.6
 GLIBCXX_3.4 {
     global:
         _ZGVNSt7num_put*; _ZNSt7num_put*;
+        _ZNSs4_Rep20_S_empty_rep_storageE;
 };

sal/util/sal_textenc/saltextenc.map

@@ -36,4 +36,5 @@ UDK_3_0_0 {
 GLIBCXX_3.4 {
     global:
         _ZGVNSt7num_put*; _ZNSt7num_put*;
+        _ZNSs4_Rep20_S_empty_rep_storageE;
 };

salhelper/source/gcc3.map

@@ -116,6 +116,7 @@ LIBO_UDK_3.6 { # symbols available in >= LibO 3.6
 
 # Unique libstdc++ symbols:
 GLIBCXX_3.4 {
-global:
-_ZGVNSt7num_put*; _ZNSt7num_put*;
+    global:
+        _ZGVNSt7num_put*; _ZNSt7num_put*;
+        _ZNSs4_Rep20_S_empty_rep_storageE;
 };

solenv/bin/addsym.awk

@@ -43,6 +43,7 @@ END {
     print "GLIBCXX_3.4 {"
     print "global:"
     print "_ZGVNSt7num_put*; _ZNSt7num_put*;"
+    print "_ZNSs4_Rep20_S_empty_rep_storageE;"
     print "};"
 }
 state == 2 {