sagemathgh-40555: Sirocco update to a pkg-config enabled version
    
~also fix a typo in `spkg-configure.m4` of `roman_numerals_py`, and fix
`spkg-configure.m4` of `flint` to allow versions 3.3.*~ (will be done
elsewhere - in sagemath#40568)

### 📝 Checklist

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- [x] The title is concise and informative.
- [x] The description explains in detail what this PR is about.
- [x] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation and checked the documentation
preview.

### ⌛ Dependencies

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URL: sagemath#40555
Reported by: Dima Pasechnik
Reviewer(s): Dima Pasechnik, Tobias Diez

Author: Release Manager

build/pkgs/sirocco/checksums.ini

@@ -1,4 +1,4 @@
 tarball=libsirocco-VERSION.tar.gz
-sha1=23311c0944f0c128b493589c1575476cf88177b6
-sha256=e86c9fe3b1f2cf0d3a7381d21c1fc4670f14b538c60c7cc6410ccb0f5b1fbaf8
+sha1=e3272f4a86a73854fe69b26c17f01525d8171378
+sha256=83d1dd5622120eda42c475696235dd67be8072a76baad0a70693d9743a659a61
 upstream_url=https://github.com/miguelmarco/SIROCCO2/releases/download/VERSION/libsirocco-VERSION.tar.gz

build/pkgs/sirocco/package-version.txt

@@ -1 +1 @@
-2.1.0
+2.1.1

build/pkgs/sirocco/spkg-configure.m4

@@ -0,0 +1,30 @@
+SAGE_SPKG_CONFIGURE([sirocco], [
+ SAGE_SPKG_DEPCHECK([mpfr], [
+  PKG_CHECK_MODULES([libsirocco], [libsirocco >= 2.1.0], [
+    AC_MSG_RESULT([found libsirocco >= 2.1.0, will use installed version])
+  ],[
+    AC_MSG_RESULT([couldn't find libsirocco >= 2.1.0. Trying to find an instance without pkg-config])
+    AC_CHECK_HEADER([sirocco.h], [
+         BACKUP_LIBS=${LIBS}
+	 LIBS="${LIBS} -lmpfr -lsirocco"
+         AC_LINK_IFELSE([
+            AC_LANG_PROGRAM(
+            [[#include <sirocco.h>
+            ]], [[
+	      double tcoefs[]={-2.,2.};
+	      homotopyPath(2, tcoefs, 1., 0.);
+            ]])], [
+                AC_MSG_RESULT([yes])
+            ], [
+                AC_MSG_RESULT([no])
+                sage_spkg_install_sirocco=yes
+            ], [
+                dnl assume that the person running cross-compiling
+                dnl knows what they are doing
+                AC_MSG_RESULT([yes])
+            ]) 
+	 LIBS=${BACKUP_LIBS}
+  ], [sage_spkg_install_sirocco=yes])
+  ])
+ ])
+])