build-sys: Fix up meson install paths

Brings things in line with the autotools build, and adds ALSA mixer
paths and profile-sets into the meson build system as well.

The module installation path is also now customisable.

src/modules/alsa/meson.build

@@ -32,5 +32,8 @@ libalsa_util = shared_library('libalsa_util',
   c_args : [pa_c_args, server_c_args],
   include_directories : [configinc, topinc],
   dependencies : [libpulse_dep, libpulsecommon_dep, libpulsecore_dep, alsa_dep, dbus_dep, libm_dep, udev_dep],
-  install : true
+  install : true,
+  install_dir : modlibexecdir,
 )
+
+subdir('mixer')

src/modules/alsa/mixer/meson.build

@@ -0,0 +1,7 @@
+install_subdir('paths',
+  install_dir : alsadatadir
+)
+
+install_subdir('profile-sets',
+  install_dir : alsadatadir
+)

src/modules/bluetooth/meson.build

@@ -26,5 +26,6 @@ libbluez5_util = shared_library('libbluez5_util',
   c_args : [pa_c_args, server_c_args],
   include_directories : [configinc, topinc],
   dependencies : [libpulse_dep, libpulsecommon_dep, libpulsecore_dep, dbus_dep, sbc_dep],
-  install : true
+  install : true,
+  install_dir : modlibexecdir,
 )

src/modules/echo-cancel/meson.build

@@ -14,5 +14,6 @@ libwebrtc_util = static_library('libwebrtc_util',
   cpp_args : [pa_c_args, server_c_args],
   include_directories : [configinc, topinc],
   dependencies : [libpulse_dep, libpulsecommon_dep, libpulsecore_dep, webrtc_dep],
-  install : true
+  install : true,
+  install_dir : modlibexecdir,
 )

src/modules/meson.build

@@ -261,6 +261,7 @@ foreach m : all_modules
     include_directories : [configinc, topinc],
     c_args : [pa_c_args, server_c_args, '-DPA_MODULE_NAME=' + name.underscorify()] + extra_flags,
     install : true,
+    install_dir : modlibexecdir,
     dependencies : [thread_dep, libpulse_dep, libpulsecommon_dep, libpulsecore_dep] + extra_deps,
     link_args : [ '-Wl,--no-undefined' ],
     link_with : extra_libs,

src/modules/raop/meson.build

@@ -20,5 +20,6 @@ libraop = shared_library('libraop',
   c_args : [pa_c_args, server_c_args],
   include_directories : [configinc, topinc],
   dependencies : [libpulse_dep, libpulsecommon_dep, libpulsecore_dep, librtp_dep, openssl_dep],
-  install : true
+  install : true,
+  install_dir : modlibexecdir,
 )

src/modules/rtp/meson.build

@@ -20,7 +20,8 @@ librtp = shared_library('librtp',
   c_args : [pa_c_args, server_c_args],
   include_directories : [configinc, topinc],
   dependencies : [libpulse_dep, libpulsecommon_dep, libpulsecore_dep],
-  install : true
+  install : true,
+  install_dir : modlibexecdir,
 )
 
 librtp_dep = declare_dependency(link_with: librtp)