[lldb] Put SBSourceLanguageName in lldb namespace (llvm#91685)

(cherry picked from commit 3bde798)

Author: bulbazord

lldb/scripts/generate-sbapi-dwarf-enum.py

@@ -15,6 +15,8 @@
 
 #ifndef LLDB_API_SBLANGUAGE_H
 #define LLDB_API_SBLANGUAGE_H
+
+namespace lldb {
 /// Used by \\ref SBExpressionOptions.
 /// These enumerations use the same language enumerations as the DWARF
 /// specification for ease of use and consistency.
@@ -24,6 +26,8 @@
 FOOTER = """\
 };
 
+} // namespace lldb
+
 #endif
 """