component/tesseract: Workaround for slaprunner paths with double slashs

This is basically the same problem as in 1b291415
(component/ghostscript: Workaround for slaprunner paths with double
slashs, 2021-06-02)

component/tesseract/buildout.cfg

@@ -26,6 +26,9 @@ md5sum = 51fe2bcbff1bbce77a25d180fd247f7d
 pkg_config_depends = ${leptonica:location}/lib/pkgconfig:${fontconfig:location}/lib/pkgconfig:${fontconfig:pkg_config_depends}:${lcms2:location}/lib/pkgconfig:${xz-utils:location}/lib/pkgconfig
 pre-configure =
   autoreconf -ivf -I${pkgconfig:location}/share/aclocal -I${libtool:location}/share/aclocal -Wno-portability
+# XXX workaround path on slaprunner with a double slash
+# https://github.com/tesseract-ocr/tesseract/issues/3527
+configure-options = --prefix=$(python -c 'print("""@@LOCATION@@""".replace("//", "/"))')
 
 environment =
   PATH=${pkgconfig:location}/bin:${autoconf:location}/bin:${automake:location}/bin:${libtool:location}/bin:${m4:location}/bin:${patch:location}/bin:%(PATH)s