package/softhsm2: needs threads

softhsm2 needs threads since the addition of the package in commit
53873b6daecd2a97740833cae7c5b4cdb185a6b2 to avoid the following build
failure:

osmutex.cpp:240:2: error: #error "There are no mutex implementations for your operating system yet"
  240 | #error "There are no mutex implementations for your operating system yet"
      |  ^~~~~

While at it, fix a typo in comment

Fixes:
 - http://autobuild.buildroot.org/results/40a8c2d9f58fbe490b6832754fdf8ac4ee0804fc

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/softhsm2/Config.in

@@ -2,6 +2,7 @@ config BR2_PACKAGE_SOFTHSM2
 	bool "softhsm2"
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 # C++11
+	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on !BR2_STATIC_LIBS # dlopen()
 	select BR2_PACKAGE_OPENSSL
 	select BR2_PACKAGE_OPENSSL_FORCE_LIBOPENSSL
@@ -14,6 +15,7 @@ config BR2_PACKAGE_SOFTHSM2
 
 	  https://www.opendnssec.org/softhsm
 
-comment "sofhsm2 needs a toolchain w/ C++, gcc >= 4.8 and dynamic library support"
+comment "softhsm2 needs a toolchain w/ C++, threads, gcc >= 4.8 and dynamic library support"
 	depends on !BR2_INSTALL_LIBSTDCPP || BR2_STATIC_LIBS || \
+		!BR2_TOOLCHAIN_HAS_THREADS || \
 		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_8