Fix tab/space indentation inconsistencies in rfc_xconf_handler.cpp

[Copilot]

Addresses feedback on PR #158 regarding mixed tabs and spaces at lines 1296, 1298, and 1302 in rfc_xconf_handler.cpp.

Changes

• Indentation normalization: Replaced tabs with 4-space indentation to match surrounding code

  • Line 1296: Removed trailing tab after touch_file.close();
  • Lines 1298, 1302: Replaced leading tabs with spaces for RDK_LOG statements

• Build artifact management: Added .gitignore to exclude autotools-generated files (Makefile.in, configure, aclocal.m4, etc.)

-    touch_file.close();	
+    touch_file.close();

-	RDK_LOG(RDK_LOG_INFO, LOG_RFCMGR, "[%s][%d] Clearing DB Value: %s\n", ...);
+    RDK_LOG(RDK_LOG_INFO, LOG_RFCMGR, "[%s][%d] Clearing DB Value: %s\n", ...);

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