Add back pkgconfig patch lost in the previous commit

What the patch did was to move libstdc++ to private section, so that
other packages that depend on LibRaw wouldn't be required to link
against libstdc++.

This should fix shotwell to build against LibRaw again.

LibRaw-pkgconfig.patch

@@ -0,0 +1,26 @@
+--- LibRaw-0.20-Beta1/libraw.pc.in~	2020-05-13 14:22:12.656424311 +0200
++++ LibRaw-0.20-Beta1/libraw.pc.in	2020-05-13 14:22:27.481441569 +0200
+@@ -5,7 +5,8 @@
+ 
+ Name: libraw
+ Description: Raw image decoder library (non-thread-safe)
+-Requires: @PACKAGE_REQUIRES@
++Requires.private: @PACKAGE_REQUIRES@
+ Version: @PACKAGE_VERSION@
+-Libs: -L${libdir} -lraw -lstdc++@PC_OPENMP@
++Libs: -L${libdir} -lraw@PC_OPENMP@
++Libs.private: -lstdc++
+ Cflags: -I${includedir}/libraw -I${includedir}
+--- LibRaw-0.20-Beta1/libraw_r.pc.in~	2020-05-13 14:22:18.034430572 +0200
++++ LibRaw-0.20-Beta1/libraw_r.pc.in	2020-05-13 14:22:27.481441569 +0200
+@@ -5,7 +5,8 @@
+ 
+ Name: libraw
+ Description: Raw image decoder library (thread-safe)
+-Requires: @PACKAGE_REQUIRES@
++Requires.private: @PACKAGE_REQUIRES@
+ Version: @PACKAGE_VERSION@
+-Libs: -L${libdir} -lraw_r -lstdc++@PC_OPENMP@
++Libs: -L${libdir} -lraw_r@PC_OPENMP@
++Libs.private: -lstdc++
+ Cflags: -I${includedir}/libraw -I${includedir}

LibRaw.spec

@@ -7,7 +7,7 @@
 Summary: Library for reading RAW files obtained from digital photo cameras
 Name: LibRaw
 Version: 0.20
-Release: 0.beta1%{?dist}
+Release: 0.beta1%{?dist}.1
 License: BSD and (CDDL or LGPLv2)
 URL: http://www.libraw.org
 
@@ -19,6 +19,7 @@ BuildRequires: autoconf automake libtool
 
 #Source0: http://www.libraw.org/data/%{name}-%{version}.tar.gz
 Source0: http://github.com/LibRaw/LibRaw/archive/%{version}-Beta1.tar.gz
+Patch0: LibRaw-pkgconfig.patch
 Provides: bundled(dcraw) = 9.25
 
 %description
@@ -53,7 +54,7 @@ Requires: %{name} = %{version}-%{release}
 LibRaw sample programs
 
 %prep
-%setup -qn %{name}-%{version}-Beta1
+%autosetup -p1 -n %{name}-%{version}-Beta1
 
 %build
 autoreconf -if
@@ -115,6 +116,9 @@ rm -fv %{buildroot}%{_libdir}/lib*.la
 
 
 %changelog
+* Wed May 13 2020 Kalev Lember <klember@redhat.com> - 0.20-0.beta1.1
+- Add back pkgconfig patch lost in the previous commit
+
 * Thu May 07 2020 Gwyn Ciesla <gwync@protonmail.com> - 0.20-0.beta1
 - 0.20 Beta 1