osgearth: simplify patch + update configuration options

This makes https://github.com/gwaldron/osgearth/pull/1077 unnecessary

src/osgearth-1-fixes.patch

@@ -42,22 +42,3 @@ index 1111111..2222222 100644
      ADD_SUBDIRECTORY( tests )
  ENDIF()
  
-
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Boris Pek <tehnick-8@yandex.ru>
-Date: Thu, 22 Mar 2018 22:53:10 +0300
-Subject: [PATCH 2/2] Fixed linking of osgEarthSymbology with geos when build
- as shared library
-
-
-diff --git a/src/osgEarthSymbology/CMakeLists.txt b/src/osgEarthSymbology/CMakeLists.txt
-index 1111111..2222222 100644
---- a/src/osgEarthSymbology/CMakeLists.txt
-+++ b/src/osgEarthSymbology/CMakeLists.txt
-@@ -1,5 +1,6 @@
- IF   (DYNAMIC_OSGEARTH)
-     ADD_DEFINITIONS(-DOSGEARTHSYMBOLOGY_LIBRARY)
-+    ADD_DEFINITIONS(-DGEOS_INLINE)
- ELSE (DYNAMIC_OSGEARTH)
-     ADD_DEFINITIONS(-DOSGEARTHSYMBOLOGY_LIBRARY_STATIC)
- ENDIF(DYNAMIC_OSGEARTH)

src/osgearth.mk

@@ -15,7 +15,8 @@ define $(PKG)_BUILD
         -DWITH_EXTERNAL_TINYXML=OFF \
         -DBUILD_OSGEARTH_EXAMPLES=OFF \
         -DBUILD_APPLICATIONS=OFF \
-        -DBUILD_TESTS=OFF
+        -DBUILD_TESTS=OFF \
+        -DCMAKE_CXX_FLAGS='-DGEOS_INLINE=1'
 
     $(MAKE) -C '$(BUILD_DIR)' -j '$(JOBS)' VERBOSE=1
     $(MAKE) -C '$(BUILD_DIR)' -j 1 install