Bugfix: NSIS: Exclude Makefile* from docs

Otherwise, the generated Makefile is included in the NSIS-installed documentation, which can lead to non-determinism (eg, if gawk is installed on some build VMs, but others only have mawk)

share/setup.nsi.in

@@ -80,7 +80,7 @@ Section -Main SEC0000
     File @abs_top_srcdir@/release/@BITCOIN_DAEMON_NAME@@EXEEXT@
     File @abs_top_srcdir@/release/@BITCOIN_CLI_NAME@@EXEEXT@
     SetOutPath $INSTDIR\doc
-    File /r @abs_top_srcdir@/doc\*.*
+    File /r /x Makefile* @abs_top_srcdir@/doc\*.*
     SetOutPath $INSTDIR
     WriteRegStr HKCU "${REGKEY}\Components" Main 1
 SectionEnd