support building with chicken-install too

Change-Id: I47510ca9d5892f1def55ab14f610ba796a6a6964

cli/cli.egg

@@ -5,9 +5,16 @@
  (component-options 
   (csc-options "-X" "r7rs" "-R" "r7rs" "-optimize-level" "3" "-C" "-D_GNU_SOURCE"))
  (components
+  (generated-source-file stock_overrides.h
+   ; Also generates stub man_rust.h, man_go.h, man_ninja.go
+   (custom-build "generate-files")
+   (source-dependencies "overrides.json"))
   (program zilch-cli-go
+   (component-dependencies stock_overrides.h)
    (source "zilch-go.scm"))
   (program zilch-cli-rust
+   (component-dependencies stock_overrides.h)
    (source "zilch-rust.scm"))
   (program zilch-cli-ninja
+   (component-dependencies stock_overrides.h)
    (source "zilch-ninja.scm"))))

cli/generate-files

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+(cat ./overrides.json; printf '\0') | xxd -i -n stock_overrides > stock_overrides.h
+(printf '(no info)\0') | xxd -i -n man_rust > man_rust.h
+(printf '(no info)\0') | xxd -i -n man_go > man_go.h
+(printf '(no info)\0') | xxd -i -n man_ninja > man_ninja.h
+