libffi: reformat

Reformat with Meson 1.9.0rc3, including the indentation bug in
mesonbuild/meson#14935, then tweak the formatting to be more legible while
still acceptable to `meson format`.

Author: bgilbert

subprojects/packagefiles/libffi/meson.build

@@ -136,10 +136,9 @@ elif host_cpu_family == 'frv'
   target = 'FRV'
   asm_sources = ['eabi.S']
 elif (host_cpu_family in ['hppa', 'hppa64'] and host_system in [
-  'linux',
+    'linux',
   'openbsd',
-]) or \
-  (host_cpu_family == 'parisc' and host_system == 'linux')
+  ]) or (host_cpu_family == 'parisc' and host_system == 'linux')
   # FIXME: hppa family is missing in Meson
   target = 'PA_LINUX'
   targetdir = 'pa'
@@ -162,12 +161,11 @@ elif host_cpu_family == 'x86' and host_system in ['freebsd', 'openbsd']
     asm_sources = ['sysv_intel.S']
   endif
 elif (host_cpu_family == 'x86' and host_system in [
-  'cygwin',
+    'cygwin',
   'windows',
   'os2',
   'interix',
-]) or \
-  (host_cpu_family == 'x86_64' and host_system in ['cygwin', 'windows'])
+  ]) or (host_cpu_family == 'x86_64' and host_system in ['cygwin', 'windows'])
   targetdir = 'x86'
   if size_t == 4
     target = 'X86_WIN32'
@@ -243,9 +241,9 @@ elif host_cpu_family == 'metag'
   # FIXME: metag family is missing in Meson
   target = 'METAG'
 elif host_cpu_family in ['mips', 'mips64'] and \
-  (host_system.startswith('irix5.') or host_system.startswith('irix6.') or host_system.startswith(
-  'rtems',
-))
+  (host_system.startswith('irix5.') or
+  host_system.startswith('irix6.') or
+  host_system.startswith('rtems'))
   target = 'MIPS'
   asm_sources = ['o32.S', 'n32.S']
 elif host_cpu_family in ['mips', 'mips64'] and host_system in [
@@ -260,9 +258,15 @@ elif host_cpu_family in ['mips', 'mips64'] and host_system in [
 elif host_cpu_family == 'or1k'
   # FIXME: or1k family is missing in Meson
   target = 'OR1K'
-elif (host_cpu_family in ['ppc', 'ppc64'] and \
-  host_system in ['linux', 'sysv', 'amigaos', 'eabi', 'beos', 'haiku', 'rtems']) or \
-  (host_cpu_family == 'ppc64' and host_system == 'freebsd')
+elif (host_cpu_family in ['ppc', 'ppc64'] and host_system in [
+    'linux',
+  'sysv',
+  'amigaos',
+  'eabi',
+  'beos',
+  'haiku',
+  'rtems',
+  ]) or (host_cpu_family == 'ppc64' and host_system == 'freebsd')
   target = 'POWERPC'
   c_sources = ['ffi.c', 'ffi_sysv.c', 'ffi_linux64.c']
   asm_sources = ['sysv.S', 'ppc_closure.S', 'linux64.S', 'linux64_closure.S']