RHEL-5 baseline ver of flex doesn't have nounistd

lets try this hack, if it fails revert and I'll just
manually update the baseline with a newer flex than
flex-2.5.4a-41.fc6

Change-Id: If644489e80fc4e4cdba97808af0fe4d544d08646

connectivity/source/parse/sqlflex.l

@@ -60,6 +60,7 @@
 #endif
 /**/
 #endif
+#define YY_NO_UNISTD_H
 
 using namespace connectivity;
 
@@ -110,7 +111,6 @@ OSQLScanner* xxx_pGLOBAL_SQLSCAN = NULL;
 
 %option noyywrap
 %option never-interactive
-%option nounistd
 %%
 
 ABS                 {SQL_NEW_KEYWORD(SQL_TOKEN_ABS);  }

idlc/source/scanner.l

@@ -257,11 +257,11 @@ static void parseLineAndFile(sal_Char* pBuf)
 #endif
 /**/
 #endif
+#define YY_NO_UNISTD_H
 %}
 
 %option noyywrap
 %option never-interactive
-%option nounistd
 
 %x DOCU
 %x COMMENT

l10ntools/source/cfglex.l

@@ -53,6 +53,7 @@
 #elif defined _MSC_VER
 #pragma warning(push, 1)
 #endif
+#define YY_NO_UNISTD_H
 
 int yycolumn = 1;
 #define YY_USER_ACTION yycolumn += yyleng;
@@ -66,7 +67,6 @@ int bText=0;
 
 %option yylineno
 %option never-interactive
-%option nounistd
 
 %p 24000
 %e 1200

l10ntools/source/srclex.l

@@ -54,6 +54,7 @@
 #elif defined _MSC_VER
 #pragma warning(push, 1)
 #endif
+#define YY_NO_UNISTD_H
 
 /* external functions (C++ code, declared as extern "C" */
 extern "C" int WorkOnTokenSet( int, char* );
@@ -68,7 +69,6 @@ void YYWarning();
 
 %option yylineno
 %option never-interactive
-%option nounistd
 
 %p 24000
 %e 1200

l10ntools/source/xrmlex.l

@@ -53,6 +53,7 @@
 #elif defined _MSC_VER
 #pragma warning(push, 1)
 #endif
+#define YY_NO_UNISTD_H
 
 /* external functions (C++ code, declared as extern "C" */
 extern "C" int WorkOnTokenSet( int, char* );
@@ -74,7 +75,6 @@ int bText=0;
 
 %option yylineno
 %option never-interactive
-%option nounistd
 
 %p 24000
 %e 1200