XHC: Switch to publicly available sources (+ update to v1.4)

Hi, this updates the recipe for XHC to use sources available publicly. Furthermore, because the public repository does not contain the previously utilized XHC v1.2, we modify the recipe to v1.4.

Golden_Repo/o/OpenMPI/OpenMPI-XHC-5.0.0rc7-1.4-GCC-11.3.0.eb

@@ -7,10 +7,7 @@ easyblock = 'ConfigureMake'
 
 # ------------------------------
 
-local_xhc_version = '1.2'
-local_xhc_sources = '/p/project/deepsea/wp5/xhc/source/xhc-v' + local_xhc_version + '.tar.gz'
-local_xhc_checksums = 'e184e86aa90a092f53c878fdcbfe8699a0b125bdca236b434dbdbae6253f02e8'
-
+local_xhc_version = '1.4'
 local_ompi_version = '5.0.0rc7'
 
 # ------------------------------
@@ -37,8 +34,8 @@ sources = [
     },
 
     {
-        'filename': local_xhc_sources,
-        'extract_cmd': 'tar -xzvf %s && mv xhc-* ./ompi/ompi/mca/coll/xhc'
+        'filename': 'https://github.com/CARV-ICS-FORTH/XHC-OpenMPI/archive/refs/tags/v' + local_xhc_version + '.tar.gz',
+        'extract_cmd': 'tar -xzvf %s && mv XHC-OpenMPI-' + local_xhc_version + '/xhc ./ompi/ompi/mca/coll/xhc'
     }
 ]
 
@@ -46,7 +43,7 @@ patches = ['OpenMPI-XHC-fixes.patch']
 
 checksums = [
     None,
-    local_xhc_checksums,
+    '56e79c41bfbed3cbf60a44661c78718b7cba97d73625d35b2239dfbf703152e6',
     '7b3e9454aa7ac28569a00f74e543c79ded0305c68502238efb6f42a83ce53a8e'
 ]
 
@@ -120,4 +117,4 @@ sanity_check_paths = {
     'dirs': [],
 }
 
-moduleclass = 'mpi'
+moduleclass = 'mpi'
\ No newline at end of file